D22/100
Inola Tap Water Quality: Is It Safe to Drink? (2026 Report)
Serving 3,149 residents · Oklahoma
What's In Inola's Tap Water?
1
Contaminants Tested
0
Exceed EPA Limits
0
Above EPA Goals
EPA Violation History
7
Violations (last 5yr)
2
Unresolved
3
Health-Related
TIER 2Unresolved
Exceeded the Maximum Contaminant Level (running average)
TIER 2Unresolved
Exceeded the Maximum Contaminant Level (running average)
TIER 3Resolved
Failed to conduct Level 2 Assessment
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
When: April 1, 2025 – June 12, 2025Rule: Stage 2 DBPREnforcement: Resolving — corrective action underway
TIER 3Resolved
Reporting violation
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
When: October 17, 2024 – July 15, 2025Rule: Ground Water RuleEnforcement: Resolving — corrective action underway
TIER 2Resolved
Treatment technique violation
When: October 17, 2024 – July 15, 2025Rule: Ground Water RuleEnforcement: Resolving — corrective action underway
TIER 3Resolved
Failed Level 2 Assessment under Revised Total Coliform Rule
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
When: September 1, 2024 – September 30, 2024Rule: Stage 1 DBPREnforcement: Resolving — corrective action underway
TIER 3Resolved
Monitoring Violation
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
When: September 1, 2024 – September 30, 2024Rule: Total Coliform RuleEnforcement: Resolving — corrective action underway
Understanding violation severity
Tier 1Urgent health risk. Utility must notify all customers within 24 hours.Tier 2Important health or treatment issue. Customers notified within 30 days.Tier 3Administrative or monitoring issue. Reported in the annual water quality report.
Source: EPA Safe Drinking Water Information System (SDWIS) · Updated quarterly
Water Utility Details
INOLA WATER WORKS INC
Population Served
1,589
Water Source
Purchased Surface Water
System ID
OK3006612
ROGERS CO RWD # 6
Population Served
1,560
Water Source
Purchased Surface Water
System ID
OK3006628
Frequently Asked Questions About Inola Water
Is Inola tap water safe to drink?
Inola, Oklahoma tap water receives a grade of D (22/100), which is considered poor. 0 contaminant(s) exceed EPA maximum contaminant levels and 72 violation(s) are on record. Residents should consider using an NSF-certified water filter to reduce contaminant exposure.
What contaminants are in Inola's water?
Of the 1 contaminants tested in Inola's water supply, the most notable include Lead (90th percentile). No contaminants exceed EPA legal limits. 1 contaminant(s) exceed EPA health goals (MCLGs), which are non-enforceable targets set at levels with no known health risk.
Does Inola have any water quality violations?
Yes, Inola has 72 EPA violation(s) on record, with the most recent in 2025. Violation types include MCL, Other, MR. 20 of these are health-based violations, which are the most serious category.
Do I need a water filter in Inola?
Inola water meets EPA standards, so a filter is not strictly necessary. However, some residents prefer the added security of a water filter. EPA health goals (MCLGs) are stricter than legal limits and are set at levels with zero expected health risk. 1 contaminant(s) exceed these stricter goals.
Where does Inola's tap water come from?
Inola's drinking water is sourced from purchased surface water and supplied by INOLA WATER WORKS INC and 1 other water system(s). The system serves approximately 3,149 people. Surface water sources include rivers, lakes, and reservoirs.
How often is Inola's water tested?
Under the Safe Drinking Water Act (SDWA), water utilities are required to regularly test for over 90 contaminants. Testing frequency varies by contaminant — some are tested monthly, others quarterly or annually. Inola's water systems must report results to the EPA and publish an annual Consumer Confidence Report (CCR). The data on this page reflects the latest available EPA testing data.
How does Inola's water compare to other cities in Oklahoma?
Inola's water quality score of 22/100 earns a grade of D, which is considered poor. This is a concerning score that suggests significant water quality issues. Visit our Oklahoma state page to see how all cities in the state compare.
What should I do if I'm concerned about Inola's water quality?
If you have concerns about Inola's tap water, consider these steps: (1) Request your utility's annual Consumer Confidence Report for detailed local data. (2) Get your water independently tested through a state-certified laboratory. (3) Consider an NSF-certified water filter rated for the contaminants found in your area. (4) Contact your water utility (INOLA WATER WORKS INC) with specific questions. (5) Report water quality issues to your state drinking water program or the EPA Safe Drinking Water Hotline at 800-426-4791.